Giraffes have changed over time to have long necks so that they can reach leaves on tall trees and drink water from a low pool even though their legs don’t bend. What big idea of biology does this situation illustrate? scientific inquiry
biology and society
adaptation and evolution
biological systems

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes